Holey AFM Probes

$1,500.00

Holey AFM probes are modified AFM probes with metal coating selectively removed above the tip on the cantilever to allow coupling of external laser source into the back of the tip .

Typically, a NIR (1.3 μm) diode laser can be used to couple light into the holey AFM probe made of silicon. The AFM tip works as a total internal reflection conical prism. Without coating/aperture, light can be focused at the probe apex to a dimension of λ/2n. With the commercial AFM tip coated with ~50 nm of gold, the light can be focused into a spot of ~20nm theoretically.